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Reports attempts to instantiate a new <code>StringBuffer</code> or
<code>StringBuilder</code> object without specifying its initial capacity.
<p>
  If no initial capacity is specified, a default capacity is used, which will rarely be optimal.
  Failing to specify the initial capacity for <code>StringBuffer</code> may result
  in performance issues if space needs to be reallocated and memory copied
  when the initial capacity is exceeded.
</p>
<p>Example:</p>
<pre><code>
  // Capacity is not specified
  var sb = new StringBuilder();
</code></pre>
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